<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="list" style="display:flex ; text-align:center;">

    </div>
    <button class="prev">上一页</button>
    <button class="next">下一页</button>
</body>

</html>
<script src="./Promise重新封装ajax函数.js"></script>
<script>

    //保存当前页码
    let page = 1
    

    //点击上一页，获取上一页的表情，渲染表情
    document.querySelector('.prev').onclick = function () {
        
        
        if (page > 1) {
            ajax('get', `https://yantianfeng.com/api/emotion`, { page: --page, count: 10 }).then( (data)=>{
                var str = data.emotions.map( (item , index)=>{
                    return `<div> <img src = "${item.url}" /> <div> ${item.title} </div> </div>`
                } ).join('')

                //渲染表情
                document.querySelector('.list').innerHTML = str
                if( page == 1 ){
                    document.querySelector('.prev').disabled = true
                }
            } )
        }
    }
    //点击下一页，获取下一页的表情，渲染表情
    document.querySelector('.next').onclick = function () {
        if (page < 4) {
            ajax('get', `https://yantianfeng.com/api/emotion`, { page: ++page, count: 10 }).then( (data)=>{
                var str = data.emotions.map((item , index)=>{
                    return `<div> <img src="${item.url}" /> <div> ${item.title} </div> </div>`
                }).join('')
                //渲染表情
                document.querySelector('.list').innerHTML = str
                if( page == 4 ){
                    document.querySelector('.next').disabled = true
                }
            } );
        }
    }
</script>